. >> genetics and 20 the investigation is the sandy hook elementary school shooting massacre. >> the state medical examiner would do a complete analysis of government-that the gunman as dna. they're not looking for anything specific in the analysis and it is on likely they will find genetic clue into lanes as motive behind the shooting. >> genetics said they're genetic component to mental illness but there are many genes involved, not just a single gene or mutation. results of the dna analysis are not expected for several weeks. >> here is a live look outside at this and tell bridge coming up on kron 4 morning news a new addition to the oakland police department to help reduce crime and we will tell you governor brown is appointed to bay area superior court next. welcome back. the timing is 4:30. . we're taking a look from mount tam. >> we could possibly see a storm bring rain. erica has the latest on our forecast. the models or potentially making a change on that. >> good morning anny. would this still see light rain for sonoma county. potentially the coastline as well. it is certai